leon panetta is sounding the alarm. >> these kinds of attacks could be a cyberpearl harbor. an attack that would cause physical destruction and the loss of life. an attack that would paralyze and shock the nation. >> doctors in pakistan say the next 48 hours are critical for a gravely injured pakistani girl who has become an international symbol of courage. the taliban gunned down the 14-year-old last week. her crime, speaking out about her right to go to school. 38 suspects are now under arrest. cnn's resa has more on the attack that shocked a nation and a world. >> reporter: blood stains covered the seats of an old canopy pickup truck. her and her classmates road together to get home from school. this is where she was sitting when gunman shot her in the head. her friend was sitting next to her, she says, when one of the attackers stopped the truck. another came around the back. gun in hand. "when we saw the gun, we started screaming." he ask ed, who is she but he recognized her and malala fell down but he kept firing. that's when my friend and i got injured. she is recover